20
P/N: PM1576
MX25L4006E
REV. 1.6, OCT. 24, 2014
(16) Read SFDP Mode (RDSFDP)
The Serial Flash Discoverable Parameter (SFDP) standard provides a consistent method of describing the functional
and feature capabilities of serial flash devices in a standard set of internal parameter tables. These parameter tables
can be interrogated by host system software to enable adjustments needed to accommodate divergent features
from multiple vendors. The concept is similar to the one found in the Introduction of JEDEC Standard, JESD68 on
CFI.
The sequence of issuing RDSFDP instruction is CS# goes low→send RDSFDP instruction (5Ah)→send 3 address
bytes on SI pin→send 1 dummy byte on SI pin→read SFDP code on SO→to end RDSFDP operation can use CS#
to high at any time during data out.
SFDP is a JEDEC Standard, JESD216.
Read Serial Flash Discoverable Parameter (RDSFDP) Sequence
23
2
1
3 4 5 6 7 8 9 10
28 29 30 31
22 21
3 2 1 0
High-Z
24 BIT ADDRESS
0
32 33 34
36 37 38 39 40 41 42 43 44 45 46
7 6 5 4 3 2
0
1
DATA OUT 1
Dummy Cycle
MSB
7 6 5 4 3 2 1 0
DATA OUT 2
MSB
MSB
7
47
7 6 5 4 3 2
0
1
35
SCLK
SI
CS#
SO
SCLK
SI
CS#
SO
5Ah
Command
Содержание MX25L4006E
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